Sierra Gas Log Kit with Bi-Flo Burner - Natural Gas 30" Vented Gas Logs - Majestic Oak Proudly Made in The USA! Sierra Radiant Heat Gas Logs Are Hand Crafted Using Actual Oak & Pine Logs. 5 Year Limited Manufacture Warranty Included. BI-FLO Burner Burns Cleaner w/ Lower Emissions & Consumes Less Energy. No wood, No ash, No hassle....